Names
- Pennsylvania Company1
- Pennsylvania Railroad Company1
- Pennsylvania-Reading Seashore Lines1
- Pere Marquette Line Steamers.1
- Pere Marquette Railroad Company1
- Pere Marquette Railway Company1
- Pere Marquette Railway.1
- Philadelphia, Baltimore and Washington Railroad Company1
- Pittsburgh and Lake Erie Railroad Company1
- Pittsburgh, Chartiers and Youghiogheny Railway Company1
- Pittsburgh, Youngstown and Ashtabula Railway Company1
- Pontiac, Oxford and Northern Railroad Company.1
- Port Huron and North Western Railway Company.1
- Richmond-Washington Company1
- Rio Grande Southern Railroad.1
- Saginaw Valley and St. Louis Railroad Company.1
- Saginaw, Tuscola and Huron Railroad Company.1
- Saint Charles Air Line Railroad1
- Saldern Logging Company.1
- Seaman & Webster.1